83 Ill. Adm. Code 462.100
Maintenance of Records
Section 462.100 Maintenance of Records
The applicant or certificate holder shall agree to adopt and
follow rules and procedures ensuring that documentation regarding installations
is retained for a period of not less than 3 calendar years after the calendar
year in which it was created. These records shall be made available to the Commission,
upon request, on a confidential and proprietary basis.